Experimental investigation and numerical analysis of multi-material interfaces related to a composite joint concept

• An insert concept for reinforcing bolt-holes with high strength metals was previously introduced by the authors, where inserts are anchored in composite laminates through interlacement of composite plies and thin metal patches. The resulting finger-joints must be strong enough to avoid composite-metal debonding happening before bearing failure at the bolt-hole. The strength of the composite-metal interfaces is thus crucial for successful implementation of the insert concept. The paper presents an experimental study investigating the strength of various interface geometries between a prepreg composite material and stainless steel or titanium alloy inserts. In addition to the experimental work, finite element simulations are performed to analyse the stresses at the interfaces. The results indicate that the stress concentrations at multi-material corner points govern the failure and that the strength can be enhanced by expedient design.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Composite Science and Engineering (hsv//eng)

Keyword

Flyg- och rymdteknik

Aerospace Engineering

Teknisk materialvetenskap

Materials Science and Engineering

Engineering Mechanics

Teknisk mekanik

Fiber- och polymervetenskap

Fibre and Polymer Science

Hållfasthetslära

Solid Mechanics

Publication and Content Type

vet (subject category)

rap (subject category)